miim

### MP-022 Atlas Y3 counter fault

The amp/check/divide board detected a Y3-axis counter fault. Possible causes are:

- The laser beam is blocked.

- The laser beam is not properly aligned in the interferometer.

- There is too much DC offset in the OPD Lissajous.

- There is not sufficient amplitude in the OPD Lissajous.

- The axis is moving too fast (over 25 in/sec. for laser machines).

What you should do:

1. To clear the error, click Clear error in the XYZ Display window.

To clear it using an RCU-II, press and hold down the Servo Power Off button and then press the Joy button twice.

2. If the error reoccurs, contact your Giddings & Lewis service representative.